His silvers damage is based on the total healing to him, not just the abilties healing. If you pair him with another healer he can do a massive amount of damage is a short time. The trick is he has to take a lot of damage and still live. I’ve had games where he one shots heros and others where he dies before he can even get it off. It’s a difficultly combo to pull off, but can win you pvp game easily.
Obviously he is great paired with a gold mandrake and gammond, but I like to combo him with quick heals such as moss. If you can time moss’ heal at the same time his recharge is going on, you can quickly swap over to him and break the ability and dealing the damage. If you are able to pull the combo off (and depending on your fortress rank/teir) you can deal like 80-100k damage in about 2-4 seconds into his recharge depending on how well timed.